川中北部地区下寒武统沧浪铺组沉积特征及演化模式

doi:10.11885/j.issn.1674-5086.2024.07.21.02

西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (5): 24-38.DOI: 10.11885/j.issn.1674-5086.2024.07.21.02

川中北部地区下寒武统沧浪铺组沉积特征及演化模式

屈海洲^1,2, 杨诗媛^1,2, 李居正³, 文思颖³, 周琳琅⁴

1. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
2. 西南石油大学地球科学与技术学院, 四川成都 610500;
3. 中国石油西南油气田公司勘探事业部, 四川成都 610000;
4. 中国石油西南油气田公司川中油气矿, 四川遂宁 629000

收稿日期:2024-07-21 发布日期:2025-11-04
通讯作者: 屈海洲，E-mail:quhaizhou@swpu.edu.cn
作者简介:屈海洲，1987年生，男，汉族，河南信阳人，副教授，博士，主要从事沉积学及储层地质学等方面的研究工作。E-mail: quhaizhou@swpu.edu.cn
杨诗媛，2000年生，女，汉族，四川成都人，硕士，主要研究碳酸盐岩储层地质学。E-mail: 8449-66778@qq.com
李居正，1990年生，男，汉族，四川成都人，工程师，主要从事石油地质等方面的工作。E-mail: lijuzheng168@petrochina.com.cn
文思颖，1996年生，女，汉族，重庆人，工程师，硕士，主要从事油气地质综合研究和勘探评价等方面的工作。E-mail: wsy02-27@petrochina.com.cn
周琳琅，1989年生，女，汉族，四川武胜人，工程师，主要从事油气田开发等方面的工作。E-mail:zhoull1@petrochina.com.cn
基金资助:
国家自然科学基金（42472174，42272181)；中国石油西南石油大学创新联合体科技合作项目（2020CX010301）

Sedimentary Characteristics and Evolution Model of Lower Cambrian Canglangpu Formation in Central and Northern Sichuan Basin

QU Haizhou^1,2, YANG Shiyuan^1,2, LI Juzheng³, WEN Siying³, ZHOU Linlang⁴

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. Exploration Department, Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan 610000, China;
4. Central Sichuan Oil and Gas Mine, Southwest Oil and Gas Field Company, PetroChina, Suining, Sichuan 629000, China

Received:2024-07-21 Published:2025-11-04

摘要/Abstract

摘要： 为深化川中北部地区下寒武统沧浪铺组沉积相认识、明确该区碳酸盐岩滩体展布的有利区，基于岩芯、测井、地震、野外露头等资料对研究区沧浪铺组沉积特征及演化模式进行系统研究。结果表明： 1）研究区沧浪铺组沉积相包括浑水潮坪相、混积台地相、局限台地相、开阔台地相4种类型；其中浑水潮坪相可分为潮间带和潮下带两个亚相，岩性以碎屑岩为主；混积台地相可分为台坪和台内洼地两个亚相，以混积岩为主；局限台地相和开阔台地相以沉积碳酸盐岩为主，前者以云岩为主，后者以灰岩为主。2）沧一段受西部陆源碎屑注入及德阳——安岳裂陷槽的影响，自西向东依次发育浑水潮坪相、混积台地相、局限台地相和开阔台地相。3）沧二段沉积期，先期裂陷槽几乎被填平补齐，以浑水潮坪相沉积为主。综上，研究区有利滩体主要发育在先期裂陷槽东侧的局限台地——开阔台地相中，受裂陷槽及海退的影响，滩体逐渐往东迁移。

关键词: 沉积演化, 沉积模式, 下寒武统, 沧浪铺组, 四川盆地

Abstract: To deepen the understanding of the sedimentary facies of the Lower Cambrian Canglangpu Formation in the northern part of the Sichuan Basin and clarify the favorable areas for the distribution of carbonate beaches. Based on core, logging, seismic and field outcrop data, this paper studies the sedimentary characteristics and evolution model of the Lower Cambrian Canglangpu Formation. The results show that: 1) The sedimentary facies of Canglangpu Formation in the study area can be divided into four types: muddy water tidal flat facies, mixed platform facies, restricted platform facies and open platform facies. The muddy water tidal flat facies can be divided into two subfacies of intertidal zone and subtidal zone, and the lithology is mainly clastic rock. The mixed platform facies can be divided into two subfacies: platform flat and platform depression, which are dominated by mixed rock deposits. The restricted platform facies and the open platform facies are dominated by carbonate deposits. The former is dominated by dolomite, and the latter is dominated by limestone. 2) From west to east, muddy water tidal flat facies, mixed platform facies, restricted platform facies and open platform facies are successively developed in the first member of Canglangpu Formation under the influence of western terrigenous debris injection and Deyang-Anyue rift trough. 3) During the sedimentary period of the second member of Canglangpu Formation, the early rift trough was almost filled up, and the muddy water tidal flat facies was the main sedimentary facies. In summary, the favorable beach bodies in the study area are mainly developed in the restricted platform-open platform facies on the east side of the pre-rift trough. Affected by the rift trough and regression, the beach bodies gradually migrate eastward.

Key words: sedimentary evolution, sedimentary model, Lower Cambrian, Canglangpu Formation, Sichuan Basin

中图分类号:

TE132

屈海洲, 杨诗媛, 李居正, 文思颖, 周琳琅. 川中北部地区下寒武统沧浪铺组沉积特征及演化模式[J]. 西南石油大学学报(自然科学版), 2025, 47(5): 24-38.

QU Haizhou, YANG Shiyuan, LI Juzheng, WEN Siying, ZHOU Linlang. Sedimentary Characteristics and Evolution Model of Lower Cambrian Canglangpu Formation in Central and Northern Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(5): 24-38.

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川中北部地区下寒武统沧浪铺组沉积特征及演化模式

Sedimentary Characteristics and Evolution Model of Lower Cambrian Canglangpu Formation in Central and Northern Sichuan Basin

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